折射率同化和弯曲角同化比较  

Comparison of Refractivity Assimilation and Bending Angle Assimilation

作　　者：徐贤胜[1] 李磊[1] 张翼鹏[1] 

机构地区：[1]温州大学数学与信息科学学院,温州325035

出　　处：《科学技术与工程》2008年第9期2315-2318,共4页Science Technology and Engineering

基　　金：国家自然科学基金(40605012);浙江省自然科学基金(Y506040);浙江省温州市科技计划项目(S20060025)资助

摘　　要：近年来GPS无线电掩星探测技术已成为国际空间测量技术中最热门的研究方向之一,而掩星数据变分同化方法是研究的热点。在球对称模式下,可行且合理的同化方案有折射率同化和弯曲角同化两种。对折射率同化的结果进行了分析;通过Abel积分变换对折射率廓线进行积分得到弯曲角廓线,对其特性进行了深入探讨;并对折射率同化和弯曲角同化的优缺点进行了探讨。In recent years, the technique of global positioning system/low earth orbit （GPS/LEO） radio occultation has opened up a new route for exploring the earth atmosphere. And the occultation variational assimilation is one of the hottest research fields. In the spherically symmetric assumptions, there are two reasonable assimilation methods：refractivity assimilation and bending angle assimilation. The results of the refractivity assimilation are ana- lyzed. Bending angle profile is obtained by Abel integral from refractivity profile; and the advantages and disadvan- tages of the refractivity assimilation and bending angle assimilation are discussed.

关 键 词：GPS掩星 变分同化 弯曲角 折射率 

分 类 号：P128.14[天文地球—天体测量]